I have a big problem.... and need help from your experience/knowledge.

I previously install and use FREEBSD 7.0 release on my storage/backup
file server, for some reason, I can not transfer any files that is bigger
than 1GB. If I transfer it to Freebsd file server, the system complain
a kernel panic and reboot itself. So, I then waited and finally try
the new FreeBSD 7.1 release 2 days ago and test out with
transfer a file larger than 1GB, well, the system just freeze so I have
to reboot the system.
So does anyone know what is going on? Is there a limit size on for
transfer large file? What can I do to resolve this? FreeBSD is my file
server and backup and if I can not transfer large file guess I have to
change to UBUNTU and hope that it will not have the same problem.

I remember a very long time ago I have a similar problem and it turned out to be the network card.
You can try and replace it and see if it still happens.
My problem was that using samba the server would hang but using sftp it was working fine.

I think so too, because I change the storage drive to a new Maxtor 1TB
hard drive and transfer a 2.1GB file to it and still have either freeze or reboot
itself. Well, I use the built-in network feature on the motherboard.
I still keep FreeBSD on a separate drive, but it should not interfere
with the transfer file, I think and not sure.

I just purchase a new network card and disable the built-in on the motherboard
and try out the new card to see if the freeze/reboot happen, guess what
it freeze and I transfer the second file both combine is about 1.7GB.
Here is the output display when it freeze, system is unuseable now.
Please let me know if anyone can help me out.

Yeah,
I did use memtest86+ to check the memory and indeed it was one of the memory stick fault, so I took that stick out so just 1GB of memory on the
system now. However the problem is not resolve yet, well I already
did install Ubuntu server and test some file transfering to see what else
is happening in my server system.

I use memtest86 and show that one of the memory stick generate error
and did not even pass one test, lucky I have two stick in there, remove
the bad one, leave the good in and test transfer files both large and small
onto the new Maxtor 1TB hard drive and everything work smooth so far.

Just an update and share with everyone how I got this transfer files issue
at the beginning.